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Going from a 24 to a 28 tooth..(4 posts)

Going from a 24 to a 28 tooth..Lone Gunman
Mar 7, 2002 1:41 PM
gear on my freewheel. In using the old chain that was the correct length for the 24 as my guide, how many links do I need to add to be correct length for the 28 tooth?
4 teeth equals 1inch...C-40
Mar 7, 2002 2:49 PM
Bicycle cogs have a pitch of .5 inch per tooth. Since the chain only wraps half-way around the cog, a four tooth increase requires 1 inch of additional chain. One inch (two links) is the minimum amount that can be added or removed from a chain, or the ends won't match.
re: Going from a 24 to a 28 tooth..char
Mar 7, 2002 4:39 PM
Probably 110 or 112 links would do it. How many links are on there now? This is the restoration project, right? I use 108 links with a 42/52 chainwheels and 12x19 to 13x26 freewheels. There is a bit more leeway with the older stuff, you can run a longer chain than one that is the calculated "correct" length.
Original post was...Lone Gunman
Mar 7, 2002 5:31 PM
that the old chain (still have it) was the correct length and I would use it as a reference. So as C-40 says 2 links will do it. Thanks C-40.